SRF Cavity Development at NSCL

A number of cavities have been developed and prototyped by NSCL, in collaboration with Jefferson Laboratory, INFN Milano, and INFN Legnaro. The cavities are of especial interest for the proposed Rare Isotope Accelerator.

Multi-Cell Elliptical Cavities

The cavity design was done by INFN Milano and Jefferson Laboratory. The resonant frequency is 805 MHz. Single-cell and multi-cell prototypes were fabricated by Jefferson Laboratory and NSCL. Three 6-cell cavity prototypes have been fabricated and tested. Testing was completed in 2003, with all 3 cavities meeting the design goal for gradient and quality factor. Two of these 6-cell cavities were installed and tested in a prototype cryomodule in 2004.

Half-Wave Resonators

The cavity design was done by NSCL. A prototype was fabricated and tested at NSCL in 2002; the electron beam welding was done by industry. The resonant frequency is 322 MHz. The prototype cavity exceeded the design goal for gradient and quality factor. The half-wave prototype has been equipped with a helium vessel and tuner for testing in a prototype cryomodule.

Quarter-Wave Resonators

The cavity design was done by INFN Legnaro and NSCL. Two prototype cavities were fabricated and tested at NSCL in 2003; the electron beam welding was done by industry. Another cavity was fabricated by industry and tested at Legnaro. The resonant frequencies are 80.5 MHz and 161 MHz. The prototype cavities reached the design goal for gradient and quality factor. A quarter-wave prototype has been equipped with a helium vessel, tuner, and mechanical damper for testing in a prototype cryomodule.

Left to right: Six-Cell 805 MHz Elliptical cavity, 322 MHz Half-Wave resonator, and 80.5 MHz Quarter-Wave resonator.

Related Papers

2007

M. Meidlinger, J. Bierwagen, S. Bricker, C. Compton, T. Grimm W. Hartung, M. Johnson, J. Popielarski, L. Saxton, R. York, P. Kneisel, E. Zaplatin, “First Test Results of Half-Reentrant Single-Cell Superconducting Cavities,” presented at the 13th International Workshop on RF Superconductivity, Beijing, China, October 2007.  PDF (SRF 2007 Web site)

W. Hartung, J. Bierwagen, S. Bricker, C. Compton, T. Grimm, M. Johnson, D. Meidlinger, J. Popielarski, L. Saxton, R. C. York, G. W. Foster, I. Gonin, T. Khabiboulline, N. Solyak, R. Wagner, V. Yarba, P. Kneisel, “Fine Grain and Large Grain Niobium Cavity Prototyping for a Proton Linac,” presented at the 13th International Workshop on RF Superconductivity, Beijing, China, October 2007.  PDF (SRF 2007 Web site)

W. Hartung, J. Bierwagen, S. Bricker, C. Compton, T. Grimm, M. Johnson, F. Marti, J. Popielarski, L. Saxton, R. C. York, A. Facco, E. Zaplatin, “Niobium Quarter-Wave Resonator Development for a Heavy Ion Re-accelerator,” presented at the 13th International Workshop on RF Superconductivity, Beijing, China, October 2007.  PDF (SRF 2007 Web site)

C. Compton, D. Baars, T. Bieler, J. Bierwagen, S. Bricker, W. Hartung, D. Pendell, R. York, L. Cooley, H. Jiang, B. Kephart, “Studies of Alternative Techniques for Niobium Cavity Fabrication,” presented at the 13th International Workshop on RF Superconductivity, Beijing, China, October 2007.  PDF (SRF 2007 Web site)

J. T. Popielarski, T. L. Grimm, W. Hartung, R. C. York, “Design of Half-Reentrant SRF Cavities for Heavy Ion Linacs,” in Proceedings of the 2007 Particle Accelerator Conference, C. Petit-Jean-Genaz, Editor, IEEE Publishing, Piscataway, New Jersey, 2007, p. 2328-2330.  PDF (JACoW)

Chris Compton, Ahmad Aizaz, Derek Baars, Tom Bieler, John Bierwagen, Steve Bricker, Terry Grimm, Walter Hartung, Hairong Jiang, Matt Johnson, John Popielarski, Laura Saxton, Claire Antoine, Bob Wagner, Peter Kneisel, “Single Crystal and Large Grain Niobium Research at Michigan State University,” in Single Crystal - Large Grain Niobium Technology: Proceedings of the International Niobium Workshop: Araxá, Brazil, 2006, G. R. Myneni, T. Carneiro, and A. Hutton, Editors, AIP CP 927, American Institute of Physics, Melville, New York, 2007, p. 98-105.  Paper (AIP) PDF (preprint)

2006

M. Meidlinger, J. Bierwagen, S. Bricker, C. Compton, T. Grimm, W. Hartung, M. Johnson, J. Popielarski, L. Saxton, R. York, E. Zaplatin, “Prototyping of a Single-Cell Half-Reentrant Superconducting Cavity,” in Proceedings of Linac 2006: XXIII International Linear Accelerator Conference: Knoxville, Tennessee, p. 685-687.  PDF (JACoW)

E. Zaplatin, T. L. Grimm, W. Hartung, M. Johnson, M. Meidlinger, J. Popielarski, “Lorentz Force Detuning Analysis for Low-Loss, Reentrant and Half-Reentrant Superconducting RF Cavities,” in Proceedings of Linac 2006: XXIII International Linear Accelerator Conference: Knoxville, Tennessee, p. 734-736.  PDF (JACoW)

D. Meidlinger, J. Bierwagen, S. Bricker, C. Compton, T. Grimm, W. Hartung, M. Johnson, J. Popielarski, L. Saxton, “High-Current Elliptical Cavity Design and Prototyping,” in Proceedings of Linac 2006: XXIII International Linear Accelerator Conference: Knoxville, Tennessee, p. 752-754.  PDF (JACoW)

W. Hartung, J. Bierwagen, S. Bricker, C. Compton, T. Grimm, M. Johnson, D. Meidlinger, J. Popielarski, L. Saxton, R. C. York, G. W. Foster, I. Gonin, T. Khabiboulline, N. Solyak, R. Wagner, V. Yarba, P. Kneisel, “Prototyping of a Superconducting Elliptical Cavity for a Proton Linac,” in Proceedings of Linac 2006: XXIII International Linear Accelerator Conference: Knoxville, Tennessee, p. 758-760.  PDF (JACoW) PDF (preprint)

E. Zaplatin, T. L. Grimm, W. Hartung, M. Johnson, M. Meidlinger, J. Popielarski, “Structural Analysis for a Half-Reentrant Superconducting Cavity,” in Proceedings of EPAC 2006 Edinburgh: Tenth European Particle Accelerator Conference, C. Biscari et al., Editors, EPS-AG, 2006, p. 424-426.  PDF (JACoW)

D. Meidlinger, T. L. Grimm, W. Hartung, “High Current SRF Cavity Design,” Physica C 441, p. 151-154 (July 2006).  Paper (Elsevier) PDF (preprint)

M. Meidlinger, T. L. Grimm, W. Hartung, “Design of Half-Reentrant SRF Cavities,” Physica C 441, p. 155-158 (July 2006).  Paper (Elsevier) PDF (preprint)

2005

Terry L. Grimm, Ahmad Aizaz, Matt Johnson, Walter Hartung, Felix Marti, Dave Meidlinger, Mandi Meidlinger, John Popielarski, Richard C. York, “New Directions in Superconducting Radio Frequency Cavities for Accelerators,” IEEE Transactions on Applied Superconductivity 15, p. 2393-2396 (June 2005).  PDF (preprint) Paper (IEEE)

C. C. Compton, T. L. Grimm, W. Hartung, H. Podlech, R. C. York, G. Giovati, P. Kneisel, D. Barni, C. Pagani, P. Pierini, “Prototyping of a Multicell Superconducting Cavity for Acceleration of Medium-Velocity Beams,” Physical Review Special Topics--Accelerators and Beams 8, 042003 (April 2005).  Paper (PR-STAB)

2004

A. Facco, F. Scarpa, Lu Weixing, V. Zvyagintsev, C. C. Compton, T. L. Grimm, W. Hartung, F. Marti, R. York, R. Losito, E. Chiaveri, “Construction and Testing of a 161 MHz, beta = 0.16 Superconducting QWR with Steering Correction for RIA,” in Proceedings of EPAC 2004 Lucerne: Ninth European Particle Accelerator Conference, J. Chrin et al., Editors, EPS-AG/CERN, Geneva, Switzerland, 2004, p. 1015-1017.  PDF (JACoW)

2003

W. Hartung, J. Bierwagen, S. Bricker, J. Colthorp, C. Compton, T. Grimm, S. Hitchcock, F. Marti, L. Saxton, R. C. York, A. Facco, V. Zviagintsev, “Niobium Quarter-Wave Resonator Development for the Rare Isotope Accelerator,” in Proceedings of SRF 2003: 11th Workshop on RF-Superconductivity: Travemünde, Germany, DESY, Hamburg, 2004, Paper TuP14.  PDF (preprint) physics/0412031 (e-print)

V. Zvyagintsev, A. Facco, C.C. Compton, T.L. Grimm, W. Hartung, F. Marti, R. York, “Mechanical Design of a 161 MHz, beta = 0.16 Superconducting Quarter Wave Resonator with Steering Correction for RIA,” in Proceedings of SRF 2003: 11th Workshop on RF-Superconductivity: Travemünde, Germany, DESY, Hamburg, 2004, Paper TuP08.  PDF (SRF 2003 Web site)

T. L. Grimm, V. Andreev, D. Gorelov, W. Hartung, F. Marti, S. Schriber, X. Wu, R. C. York, Q. Zhao, P. Kneisel, G. Ciovati, L. Turlington, “805 MHz beta = 0.47 Elliptical Accelerating Structure R&D,” presented at the Rare Isotope Accelerator R & D Workshop, Bethesda, Maryland, 26-28 August 2003, Paper 2.2.3.  PDF (RIA SEB Web site)

T. L. Grimm, V. Andreev, D. Gorelov, W. Hartung, F. Marti, S. Schriber, X. Wu, R. C. York, Q. Zhao, A. Facco, V. Zviagintsev, “Alternative Superconducting Drift Tube Linac R&D,” presented at the Rare Isotope Accelerator R & D Workshop, Bethesda, Maryland, 26-28 August 2003, Paper 2.2.4.  PDF (RIA SEB Web site)

T. L. Grimm, J. Bierwagen, S. Bricker, C. C. Compton, W. Hartung, F. Marti, R. C. York, “Experimental Study of a 322 MHz v/c = 0.28 Niobium Spoke Cavity,” in Proceedings of the 2003 Particle Accelerator Conference, Joe Chew, Peter Lucas, & Sara Webber, Editors, IEEE Publishing, Piscataway, New Jersey, 2003, p. 1353-1355.  PDF (JACoW)

W. Hartung, C. C. Compton, T. L. Grimm, R. C. York, G. Ciovati, P. Kneisel, “Status Report on Multi-Cell Superconducting Cavity Development for Medium-Velocity Beams,” in Proceedings of the 2003 Particle Accelerator Conference, Joe Chew, Peter Lucas, & Sara Webber, Editors, IEEE Publishing, Piscataway, New Jersey, 2003, p. 1362-1364.  PDF (JACoW) PDF (preprint) physics/0311098 (e-print)

2001

C. C. Compton, T. L. Grimm, W. Hartung, H. Podlech, R. C. York, G. Ciovati, P. Kneisel, D. Barni, C. Pagani, P. Pierini, “Niobium Cavity Development for the High-Energy Linac of the Rare Isotope Accelerator,” in Proceedings of the 2001 Particle Accelerator Conference, P. Lucas & S. Webber, Editors, IEEE Publishing, Piscataway, New Jersey, 2001, p. 1044-1046.  PDF (JACoW) PDF (preprint)

H. Podlech, D. Gorelov, J.-W. Kim, F. Marti, R. York, “An Injector for a Multi Ion Beam Driver Linac,” in Proceedings of the 2001 Particle Accelerator Conference, P. Lucas & S. Webber, Editors, IEEE Publishing, Piscataway, New Jersey, 2001, p. 3933-3935.  PDF (JACoW)